Obviously you need to spend more time playing Kerbal Space Program. Rockets are their own justification.
On a more serious note, I think that's just human nature - if you're invested in something - a technology, a stack, a business model, a car - you value that investment more than its worth, because it is yours. I think there's also an element of "I put in the effort to learn this, so damnit I'm going to use it".
